Shipping carton



De. 3, 1957 B. w. K1N@ 2,815,163

I sHiPPING CARTON Fivledv oct. 18. 1954 /se /a ,sa

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! l I A IN V EN TOR.

SHIPPING CARTON Byron W. King, Lakewood, Ohio, assignor to Liftainer System Company, a corporation of Michigan Application October 18, 1954, Serial No. 462,749

3 Claims. (Cl. 229-14) This invention relates to a container and more particularly to a storage or shipping carton of the heavy duty type and preferably formed from corrugated paper board or the like.

The invention provides a carton for containing heavy articles and a means for conveniently handling the packed carton when lifting or moving the carton from one place to another.

It is an object of the present invention to provide a carton which is inexpensive to manufacture, one which is collapsible for convenient storage or return shipment when not in use, and one which may be easily lifted when packed with heavy articles.

More specilically stated, the invention provides means below the bottom wall of the carton, and integral therewith, for raising it above the floor or supporting surface, whereby a lifting device may be readily inserted between the floor and the carton without the necessity of one or more operators required for lifting or tilting the heavy carton onto the lifting device.

A further object of the invention is to form the complete carton from a single sheet of material and to cut and bend certain portions of the sheet into interlocking engagement with a reinforcing bottom frame structure which provides tunnels for receiving lifting forks on an industrial truck.

Other objects and advantages of the invention will be more fully understood from the following description taken in connection with the accompanying drawings in which:

Fig. 1 is a top plan developed View of a blank from which the carton is formed, the full lines indicating the cuts and the dot and dash lines indicating score lines where the material is folded;

Fig. 2 is a top plan developed View of a reinforcing insert to be used in the carton;

Fig. 3 is a perspective view showing the rigid frame upon which the formed carton is mounted and secured thereto;

Fig. 4 is a cross sectional view, taken on line 4-4 of Fig. 6, showing the bottom of the `carton with the rigid frame being shown in dotted lines;

Fig. 5 is a cross sectional view taken on line 5 5 of Fig. 4;

Fig. 6 is a cross sectional view taken on line 6-6 of Fig. 4; and

Fig. 7 is a cross sectional View looking into the carton at the bottom, showing a modified form of the arrangement of the reinforcing insert.

The carton 12 is preferably rectangular or square and, as herein illustrated, is formed from heavy corrugated paper board cut from a sheet, scored and folded to desired shape.

In Fig. 1, I have illustrated a blank sheet having cuts shown by the full lines and scored portions shown by the dot and dash lines for bending. The four side walls of the carton are designated by the numerals 14, 16, 18,

nited States Patent O and 20, divided vertically by the score lines 22. An attaching flap 24, provided at one side of the blank, is scored at 26 for securing to the outer edge of the side wall 20. This may be done by staples, cement or tape when the side walls are bent along the score lines 22 and 26 into the rectangular or square form.

Upper flaps 28, 30, 32, and 34 are separated vertically by cuts 36, and transverse score lines 38 for bending at right angles to the plane of the side walls 14, 16, 18, and 20 forming a top Closure for the carton.

The bottom closure of the carton is formed from flaps 40, 42, 44, 46, 48, and 50, separated vertically by cuts 52, and transverse scores 54 for bending at right angles to the plane of the side walls 14, 16, 18, and 20. The flaps joined to the side walls 16 and 20 are each divided by vertical cuts 56 forming a space between the llaps 42, 44 and 48, 50. Each of the bottom flaps are provided with extensions 58 and 60 adapted for bending along score lines 62.

When the blank is folded into the shape of the finished carton, the top closure is of two ply thickness, each ilap 28, 30, 32, and 34 extends to the mid-portion of the width of the carton. The bottom closure ilaps 40, 42, 44, 46, 48, and 50 are of a length substantially one half of the width of the carton forming a two ply bottom section and the extensions are folded outwardly so that the two extensions 56 form a two ply downwardly extending llange extending through the cuts 56 between the flaps 42, 44 and 4s, so.

The extensions 60 are folded to form another two ply outwardly extending ilange normal to the downwardly extending flanges formed by the two extensions 58. By such arrangement and folding I have provided a carton having four sides, a top closure of two ply thickness, and a bottom closure of two ply thickness, with outwardly projecting flanges extending longitudinally and laterally at right angles to each other.

The side walls may be strengthened by a liner 62, which is shown in developed form in Fig. 2. It is folded to rectangular shape and inserted in the carton. If desired the insert liner 62 may be arranged as shown in Fig. 7 so that the central portion of the side walls 14, 16, 18, and 20 are strengthened by the corner sections of the liner 62. By such an arrangement the load in the carton is more evenly divided so that there is less lateral pressure on the side walls of the carton. Vertical reinforcing slats 64 may be positioned between the walls of the carton and the liner.

The rigid reinforcing frame, preferably of wood, consists of three parallel strips 66, 68, and 70 spaced apart so that the strip 66 is underneath one side wall 14, the strip 68 under the center of the carton, and the strip 70 under the opposite side wall 18. Four parallel strips 72, 74, 76, and 78, extending transversely of the strips 66, 68, and 70 are nailed to the strips 66, 68, and 70. These strips are spaced apart so that the strip 72 is under the side wall 20, the strip 78 under the side wall 16, and the strips 74 and 76 at the center of the carton but spaced apart a distance to receive therebetween the two ply flange 58, projecting outwardly from the bottom closure. The center strip 68 is provided with a groove 80 on its top side to receive the two ply flange 60 projecting outwardly from the bottom closure. Each of the strips 66, 68, and 70 are provided with a transverse groove 82 beneath the spaced strips 74 and 76 to receive the two ply flange 58.

The extensions 58 are cut as at 84 in Fig. 1 providing a tab 86. When the carton is assembled to the rigid support, the carton is held against shifting, both laterally and longitudinally by the flanges 58 in the grooves 82 and between the spaced strips 74, 76 in one direction, and by 3 the flanges 60 in the groove 86 in the other direction. The carton is held to the frame by bending the tabs 86 under the strip 74 or 76 as illustrated in Figs. 5 and 6.

The extensions 58 are of a length greater than the thickness of strips 72, 74, 76, and 78 so that they project below the under surface of the `strips into the tunnels formed by the strips 66, 68 and 70 and the bottom of the strips 72, 74, 76, and 78. When the forks of a lifting truck are inserted into the tunnels for lifting the carton, the outwardly projecting portion of the extensions is crushed crimping the edges of the extensions 58 against the bottom surfaces of the strips 74 and 76 to firmly lock the carton to the rigid reinforcing frame.

As a further means for preventing side shifting of the carton 12 on the reinforcing frame, there are provided angle brackets 88, preferably of metal, which have one flange nailed to the upper faces of the strips 74 and 76 at their opposite ends, and to the top central portion of strips 72 and 78. The other ange of the brackets extend upwardly with its inner face ush with the outside face of the side walls of the carton.

There are many advantages obtained by the use of a carton, as above described. The carton is inexpensive to manufacture. It is easily fabricated. It can be folded to a at position for economical storage and shipment when not in use. It is reinforced where strength is required and above al1 it is provided with means for elevating the bottom of the carton above a Hoor or other support for permitting access to lifting forks for the carton without manually tilting a heavily loaded carton, such as used in packaging bolts, nails, nuts and other metal parts.

It will be understood that while I have illustrated a preferred form of the invention, various changes, including the size, shape and arrangement of parts, may be made without departing from the spirit of my invention and it is not my intention to limit its scope other than by the terms of the appended claims.

I claim:

1. A carton formed from paper board having four side walls and a bottom closure with integral outwardly extending flanges projecting downwardly from the bottom closure, a reinforcing frame of wood below said bottom closure comprising spaced longitudinally extending strips, and spaced transverse strips secured to the upper surface of said longitudinally extending strips at the center of said reinforcing frame, said outwardly extending flanges extending between and in frictional engagement with a pair of adjacent transverse strips, and tabs bent from the flanges engaging the under surfaces of said transverse strips.

2. A carton formed from paper board having four side walls and a bottom closure with integral outwardly extending flanges projecting downwardly from the bottom closure, said flanges extending longitudinally through the center of the carton and at right angles to each other, a reinforcing frame of wood below said bottom comprising at least three spaced longitudinally extending strips, a groove in the upper surface of the centrally located longitudinally extending strips, a pair of spaced transverse strips secured to the upper surface of said longitudinally extending strips, one of said outwardly extending anges extending between and in frictional engagement with said pair of adjacent transverse strips, the other of said flanges received in the groove formed in said centrally located strip, and tabs bent from one of the flanges engaging the under surface of said transverse strip.

3. A carton formed from paper board having four side walls and a bottom closure with integral outwardly extending anges projecting downwardly from the bottom closure, a reinforcing frame of wood below said bottom closure comprising, spaced longitudinally extending strips, and a pair of centrally located spaced transverse strips secured to the upper surface of said longitudinally extending strips, said outwardly extending flanges extending between and in frictional holding engagement with said pair of adjacent transverse strips, tabs bent from the flanges engaging the under surfaces of said transverse strips, and angle brackets secured to said frame anged upwardly along the sides of said carton.

References Cited in the file of this patent UNITED STATES PATENTS 1,925,298 Boeye Sept. 5, 1933 2,277,674 Belsinger Mar. 31, 1942 2,378,932 Kirby June 26, 1945 2,673,022 Prossen Mar. 23, 1954 2,739,754 Anderson Mar. 27, 1956 FOREIGN PATENTS 623,024 Great Britain May 11, 1949 

